Add support for retrieving remote address in HTTP listener

Release/include/cpprest/http_msg.h

@@ -715,6 +715,8 @@ class _http_request final : public http::details::http_msg_base, public std::ena
 
     _ASYNCRTIMP void set_request_uri(const uri&);
 
+    const utility::string_t& remote_address() const { return m_remote_address; }
+
     const pplx::cancellation_token &cancellation_token() const { return m_cancellationToken; }
 
     void set_cancellation_token(const pplx::cancellation_token &token)
@@ -755,6 +757,8 @@ class _http_request final : public http::details::http_msg_base, public std::ena
 
     void _set_base_uri(const http::uri &base_uri) { m_base_uri = base_uri; }
 
+    void _set_remote_address(const utility::string_t &remote_address) { m_remote_address = remote_address; }
+
 private:
 
     // Actual initiates sending the response, without checking if a response has already been sent.
@@ -778,6 +782,8 @@ class _http_request final : public http::details::http_msg_base, public std::ena
     std::shared_ptr<progress_handler> m_progress_handler;
 
     pplx::task_completion_event<http_response> m_response;
+
+    utility::string_t m_remote_address;
 };
 
 
@@ -869,6 +875,12 @@ class http_request
     /// </remarks>
     const http_headers &headers() const { return _m_impl->headers(); }
 
+    /// <summary>
+    /// Returns a string representation of the remote IP address.
+    /// </summary>
+    /// <returns>The remote IP address.</returns>
+    const utility::string_t& get_remote_address() const { return _m_impl->remote_address(); }
+
     /// <summary>
     /// Extract the body of the request message as a string value, checking that the content type is a MIME text type.
     /// A body can only be extracted once because in some cases an optimization is made where the data is 'moved' out.

Release/src/http/listener/http_server_asio.cpp

@@ -654,6 +654,9 @@ will_deref_and_erase_t asio_server_connection::handle_http_line(const boost::sys
             m_close = true;
         }
 
+        // Get the remote IP address
+        m_request._get_impl()->_set_remote_address(utility::conversions::to_string_t(m_socket->remote_endpoint().address().to_string()));
+
         return handle_headers();
     }
 }

Release/src/http/listener/http_server_httpsys.cpp

@@ -555,6 +555,22 @@ void windows_request_context::read_headers_io_completion(DWORD error_code, DWORD
         m_msg.set_method(parse_request_method(m_request));
         parse_http_headers(m_request->Headers, m_msg.headers());
 
+        // Retrieve the remote IP address
+        std::vector<wchar_t> remoteAddressBuffer(50);
+        PVOID inAddr;
+
+        if (m_request->Address.pRemoteAddress->sa_family == AF_INET6)
+        {
+            inAddr = &reinterpret_cast<SOCKADDR_IN6 *>(m_request->Address.pRemoteAddress)->sin6_addr;
+        }
+        else
+        {
+            inAddr = &reinterpret_cast<SOCKADDR_IN *>(m_request->Address.pRemoteAddress)->sin_addr;
+        }
+
+        InetNtopW(m_request->Address.pRemoteAddress->sa_family, inAddr, &remoteAddressBuffer[0], remoteAddressBuffer.size());
+        m_msg._get_impl()->_set_remote_address(std::wstring(&remoteAddressBuffer[0]));
+
         // Start reading in body from the network.
         m_msg._get_impl()->_prepare_to_receive_data();
         read_request_body_chunk();

Release/tests/functional/http/listener/request_handler_tests.cpp

@@ -448,6 +448,41 @@ TEST_FIXTURE(uri_address, test_leaks)
     listener.close().wait();
 }
 
+TEST_FIXTURE(uri_address, remote_address)
+{
+    http_listener listener(U("http://localhost:45678/path1"));
+    listener.open().wait();
+
+    test_http_client::scoped_client client(U("http://localhost:45678"));
+    test_http_client * p_client = client.client();
+
+    volatile unsigned long requestCount = 0;
+
+    listener.support(methods::GET, [&requestCount](http_request request)
+    {
+        const string_t& remoteAddr = request.get_remote_address();
+        const string_t& localhost4 = string_t(U("127.0.0.1"));
+        const string_t& localhost6 = string_t(U("::1"));
+
+        // We can't guarantee that the host has both IPv4 and IPv6 available, so check for either IP
+        VERIFY_IS_TRUE((remoteAddr == localhost4) || (remoteAddr == localhost6));
+
+        os_utilities::interlocked_increment(&requestCount);
+        request.reply(status_codes::NoContent);
+    });
+
+    // Send a request to the listener
+    VERIFY_ARE_EQUAL(0, p_client->request(methods::GET, U("/path1")));
+
+    p_client->next_response().then([](test_response *p_response)
+    {
+        http_asserts::assert_test_response_equals(p_response, status_codes::NoContent);
+    }).wait();
+
+    VERIFY_IS_TRUE(requestCount >= 1);
+    listener.close().wait();
+}
+
 }
 
 }}}}